microstructured and magnetic properties of sr2co1.7mg0.3fe11.2sn0.4zn0.4o22 hexaferrite synthesized by auto-combustion sol-gel metho

A single phase y-type hexagonal ferrite sr2co1.7mg0.3fe11.2sn0.4zn0.4o22 was synthesized by sol–gel auto combustion method. the microstructured and magnetic properties of this y-type hexagonal ferrite composition have been investigated. different experimental techniques such as differential thermal and thermo-gravimetric analyses, x-ray diffraction, fourier transform infrared spectroscopy, high resolution field emission scanning electron microscopy and vibrating sample magnetometry were used to investigate the sample. the x-ray diffraction (xrd) patterns confirm single phase y-type hexagonal ferrite powders were obtained after calcinations at 1000 °c and showed that the crystallite size is 44 nm. the microstructures of the pure powders appeared as a hexagonal platelet-like structure and particles size was 90-210 nm .the saturation magnetization (ms) and the coercivity (hc) of the samples were in the range, 28.34–48.47 emu/g and 637-1108 oe, respectively. the heat treatment temperature increased the magnetization, following a decrease in coercivity due to intermediate phases replacement by single y-type hexaferrite, which can be used as soft magnetic materials in multilayer inductors for high frequency applications.